Fig. 3

Correlation analyses with plasma FGF21 levels. A BAT activity AUC in each menstrual phase (n = 13). B Maximal BAT activity in each menstrual phase (n = 13). C BAT activity AUC in the follicular phase (n = 21). D Maximal BAT activity in the follicular phase (n = 21). Boldface indicates significance. AUC, area under the curve; BAT, brown adipose tissue; BMI, body mass index; FGF21, fibroblast growth factor 21